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1 package alice.jungle.persistence;
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2
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3 import java.util.Iterator;
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4
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5 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
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6 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
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7 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result;
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TransactionManager;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TreeContext;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference.Reservation;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultError;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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20 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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21
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22 public class PersistentTransactionManager<T extends TreeNode<T>> implements TransactionManager<T> {
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23 private final AtomicReservableReference<TreeContext<T>> repository;
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24 private final TreeContext<T> tip;
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25 private final PersistentChangeListWriter writer;
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26 private final String uuid;
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27 private final String treeName;
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28
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29 public PersistentTransactionManager(String _treeName, PersistentChangeListWriter _writer,TreeContext<T> _tip,
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30 AtomicReservableReference<TreeContext<T>> _repository,String _uuid)
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31 {
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32 repository = _repository;
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33 tip = _tip;
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34 writer = _writer;
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35 uuid = _uuid;
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36 treeName = _treeName;
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37 }
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38
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39 @Override
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40 public Either<Error, TransactionManager<T>> commit(T _newRoot,final TreeOperationLog _log) {
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41 ChangeSet cs = tip.getChangeSet();
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42 long currentRevision = cs.revision();
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43 long nextRevision = currentRevision + 1;
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44
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87
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45 PersistentChangeList list = new PersistentChangeList(uuid, treeName, _log);
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46 Node root = _newRoot.getAsNode();
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47 PersistentChangeSet newCs = new PersistentChangeSet(root, cs, list, uuid, treeName, nextRevision);
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48 DefaultTreeContext<T> newContext = new DefaultTreeContext<T>(_newRoot,newCs);
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49
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50 @SuppressWarnings("rawtypes")
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51 Reservation reservation = repository.makeReservation(tip, newContext);
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52 if(reservation == null) {
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53 return DefaultEither.newA((Error)new DefaultError());
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54 }
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55 Result r = writer.write(list);
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56 if(r != Result.SUCCESS) {
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57 return DefaultEither.newA((Error)new DefaultError());
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58 }
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59 reservation.confirm();
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60 TransactionManager<T> txManager = new PersistentTransactionManager<T>(treeName, writer, newContext, repository, uuid);
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61 return DefaultEither.newB(txManager);
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62 }
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63
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64 @Override
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65 public long getRevision()
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66 {
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67 ChangeSet cs = tip.getChangeSet();
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68 return cs.revision();
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69 }
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70
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71 @Override
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72 public String getUUID() {
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73 return uuid;
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74 }
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75
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76
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77
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78 }
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